Touch Problem

iisword · 12-03-2010, 05:41 PM

I'm having some touch problems. I'm trying to make it where if you touch one of these labels, it will fire up the typing method. I'm trying it with just the first label, but no matter where I touch(even if I don't touch any other labels), the program thinks I'm only touching the first label. Can anyone help me? Here's the code:

Code:

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	UITouch *touch = [[event allTouches] anyObject]; //maybe this
	CGRect touchFrame = touch.view.frame;
	if (CGRectIntersectsRect(touchFrame, textOne.frame))
	{
		output.text = @"";
		i = 0;
		timer = [NSTimer scheduledTimerWithTimeInterval:.05
									   target:self 
									 selector:@selector(typing:) 
									 userInfo:nil 
									  repeats:YES];
	}
}

iisword · 12-03-2010, 09:25 PM

Anyone?

smasher · 12-04-2010, 07:34 AM

Code:

CGRect touchFrame = touch.view.frame;
if (CGRectIntersectsRect(touchFrame, textOne.frame)){
   //stuff
}

Calling touch.view gives you the view that was touched, and touch.view.frame is its frame. If you touch the background of your screen then that frame might be the entire screen; and the entire screen always intersects every view on the screen.

I'd log touch.view and touchFrame to see what's really happening, but you probably want to check if touch.view == textOne or [touch.view isDescendantOfView:textOne] in order to see it textOne was touched.

iisword · 12-04-2010, 01:11 PM

Alright so I did what you asked and I found out that I was clicking the background with this statement:

Code:

if (touch.view == textOne)
	{
		output.text = @"";
		i = 0;
		timer = [NSTimer scheduledTimerWithTimeInterval:.05
									   target:self 
									 selector:@selector(typing:) 
									 userInfo:nil 
									  repeats:YES];
	}
	if (touch.view == self.view) NSLog(@"Failed");

I also tried to touch the label to see if I could get it to run the first if statement, but that failed. So my question now becomes how do I get touch to realize it's touching the label.

smasher · 12-04-2010, 02:47 PM

What did you see when you log touch.view? What view (if any) is getting the touch when you click the textarea?

iisword · 12-05-2010, 01:09 AM

Quote:

Originally Posted by smasher

What did you see when you log touch.view? What view (if any) is getting the touch when you click the textarea?

I'm seeing this this from the code

Code:

if (touch.view == self.view) NSLog(@"Failed");

The self.view I believe is the background.

smasher · 12-05-2010, 10:26 AM

Sorry, I'm not being clear. You need to log the view and find out what view is being touched; then you can figure out what condition to write.

Code:

NSLog(@"touch.view: %@", touch.view);
NSLog(@"self.view: %@", self.view);
NSLog(@"textOne: %@", textOne);

NSLog(@"self.view: %d", [touch.view isDescendantOfView:textOne]);

iisword · 12-05-2010, 08:05 PM

Thanks for being clearer. Here are the results:

Code:

2010-12-05 21:04:02.749 TextBoxExample[9484:207] touch.view: <UIView: 0x4e05160; frame = (0 20; 320 460); autoresize = W+H; layer = <CALayer: 0x4e04fb0>>
2010-12-05 21:04:02.750 TextBoxExample[9484:207] self.view: <UIView: 0x4e05160; frame = (0 20; 320 460); autoresize = W+H; layer = <CALayer: 0x4e04fb0>>
2010-12-05 21:04:02.750 TextBoxExample[9484:207] textOne: <UILabel: 0x4e05b60; frame = (52 100; 49 21); text = 'Text 1'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x4e050b0>>
2010-12-05 21:04:02.751 TextBoxExample[9484:207] self.view: 0

smasher · 12-05-2010, 08:21 PM

Try getting the location of the touch, and checking if CGRectContainsPoint(textOne.frame, touchLocation). That should tell you if the touch point was inside the textOne frame.